1 /* $NetBSD: resize.c,v 1.2 2002/01/02 10:38:29 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 2001 5 * Brett Lymn. 6 * 7 * This code has been donated to The NetBSD Foundation by the Author. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)resize.c blymn 2001/08/26"; 42 #else 43 __RCSID("$NetBSD: resize.c,v 1.2 2002/01/02 10:38:29 blymn Exp $"); 44 #endif 45 #endif /* not lint */ 46 47 #include <stdlib.h> 48 49 #include "curses.h" 50 #include "curses_private.h" 51 52 extern struct __winlist *winlistp; 53 54 static int __resizewin(WINDOW *win, int nlines, int ncols); 55 56 /* 57 * wresize -- 58 * Resize the given window to the new size. 59 */ 60 int 61 wresize(WINDOW *win, int nlines, int ncols) 62 { 63 __LINE *lp; 64 int i, j; 65 __LDATA *sp; 66 67 if ((win == NULL) || (nlines < 0) || (ncols < 0)) 68 return ERR; 69 70 if (win->orig == NULL) { 71 if (nlines == 0) 72 nlines = LINES - win->begy; 73 if (ncols == 0) 74 ncols = COLS - win->begx; 75 } else { 76 /* subwins must fit inside the parent - check this */ 77 if ((nlines == 0) 78 || (nlines > (win->orig->maxy + win->orig->begy 79 - win->begy))) 80 nlines = win->orig->maxy + win->orig->begy - win->begy; 81 82 if ((ncols == 0) 83 || (ncols > (win->orig->maxx + win->orig->begx 84 - win->begx))) 85 ncols = win->orig->maxx + win->orig->begx - win->begx; 86 } 87 88 if ((__resizewin(win, nlines, ncols)) == ERR) 89 return ERR; 90 91 /* 92 * we must zot the window contents otherwise lines may pick 93 * up attributes from the previous line when the window is 94 * made smaller. The client will redraw the window anyway 95 * so this is no big deal. 96 */ 97 for (i = 0; i < win->maxy; i++) { 98 lp = win->lines[i]; 99 for (sp = lp->line, j = 0; j < win->maxx; 100 j++, sp++) { 101 sp->ch = ' '; 102 sp->bch = ' '; 103 sp->attr = 0; 104 sp->battr = 0; 105 } 106 lp->hash = __hash((char *)(void *)lp->line, 107 (int) (ncols * __LDATASIZE)); 108 } 109 110 return OK; 111 } 112 113 /* 114 * resizeterm -- 115 * Resize the terminal window, resizing the dependent windows. 116 */ 117 int 118 resizeterm(int nlines, int ncols) 119 { 120 WINDOW *win; 121 struct __winlist *list; 122 int newlines, newcols, ldelta, cdelta; 123 124 /* don't worry if things have not changed... we would like to 125 do this but some bastard programs update LINES and COLS before 126 calling resizeterm thus negating it's effect. 127 if ((nlines == LINES) && (ncols == COLS)) 128 return OK;*/ 129 130 #ifdef DEBUG 131 __CTRACE("resizeterm: (%d, %d)\n", nlines, ncols); 132 #endif 133 134 ldelta = nlines - __virtscr->maxy; 135 cdelta = ncols - __virtscr->maxx; 136 137 for (list = __winlistp; list != NULL; list = list->nextp) { 138 win = list->winp; 139 newlines = win->maxy; 140 newcols = win->maxx; 141 142 if (win->begy >= (nlines - 1)) { 143 win->begy = nlines - win->maxx - 1; 144 if (win->begy < 0) 145 win->begy = 0; 146 } 147 148 149 if ((newlines + win->begy + ldelta) == nlines) 150 newlines = nlines; 151 152 if (newlines > nlines) { 153 newlines = nlines - win->begy; 154 if (newlines < 0) 155 newlines = 1; 156 } 157 158 if ((newcols + win->begx + cdelta) == ncols) 159 newcols = ncols; 160 161 if (newcols > ncols) { 162 newcols = ncols - win->begx; 163 if (newcols < 0) 164 newcols = 1; 165 } 166 167 if (wresize(win, newlines, newcols) != OK) 168 return ERR; 169 } 170 171 LINES = nlines; 172 COLS = ncols; 173 174 /* tweak the flags now that we have updated the LINES and COLS */ 175 for (list = __winlistp; list != NULL; list = list->nextp) { 176 __swflags(list->winp); 177 } 178 179 wrefresh(curscr); 180 return OK; 181 } 182 183 /* 184 * __resizewin -- 185 * Resize the given window. 186 */ 187 static int 188 __resizewin(WINDOW *win, int nlines, int ncols) 189 { 190 __LINE *lp, *olp, **newlines, *newlspace; 191 __LDATA *newwspace; 192 int i; 193 194 #ifdef DEBUG 195 __CTRACE("resize: (%d, %d)\n", nlines, ncols); 196 __CTRACE("resize: win->wattr = %0.2o\n", win->wattr); 197 __CTRACE("resize: win->flags = %0.2o\n", win->flags); 198 __CTRACE("resize: win->maxy = %d\n", win->maxy); 199 __CTRACE("resize: win->maxx = %d\n", win->maxx); 200 __CTRACE("resize: win->begy = %d\n", win->begy); 201 __CTRACE("resize: win->begx = %d\n", win->begx); 202 __CTRACE("resize: win->scr_t = %d\n", win->scr_t); 203 __CTRACE("resize: win->scr_b = %d\n", win->scr_b); 204 #endif 205 206 /* Reallocate line pointer array and line space. */ 207 if ((newlines = realloc(win->lines, 208 nlines * sizeof(__LINE *))) == NULL) { 209 return ERR; 210 } 211 win->lines = newlines; 212 213 if ((newlspace = realloc(win->lspace, 214 nlines * sizeof(__LINE))) == NULL) { 215 return ERR; 216 } 217 win->lspace = newlspace; 218 219 /* Don't allocate window and line space if it's a subwindow */ 220 if (win->orig == NULL) { 221 /* 222 * Allocate window space in one chunk. 223 */ 224 if ((newwspace = 225 realloc(win->wspace, 226 ncols * nlines * sizeof(__LDATA))) == NULL) { 227 return ERR; 228 } 229 230 win->wspace = newwspace; 231 232 /* 233 * Point line pointers to line space, and lines themselves into 234 * window space. 235 */ 236 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 237 win->lines[i] = lp; 238 lp->line = &win->wspace[i * ncols]; 239 lp->firstchp = &lp->firstch; 240 lp->lastchp = &lp->lastch; 241 lp->firstch = 0; 242 lp->lastch = ncols - 1; 243 lp->flags = __ISDIRTY; 244 } 245 } else { 246 247 win->ch_off = win->begx - win->orig->begx; 248 /* Point line pointers to line space. */ 249 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 250 win->lines[i] = lp; 251 olp = win->orig->lines[i + win->begy 252 - win->orig->begy]; 253 lp->line = &olp->line[win->ch_off]; 254 lp->firstchp = &olp->firstch; 255 lp->lastchp = &olp->lastch; 256 lp->hash = __hash((char *)(void *)lp->line, 257 (int) (win->maxx * __LDATASIZE)); 258 lp->flags = __ISDIRTY; 259 } 260 } 261 262 263 win->cury = win->curx = 0; 264 win->maxy = nlines; 265 win->maxx = ncols; 266 win->scr_b = win->maxy - 1; 267 __swflags(win); 268 269 #ifdef DEBUG 270 __CTRACE("resize: win->wattr = %0.2o\n", win->wattr); 271 __CTRACE("resize: win->flags = %0.2o\n", win->flags); 272 __CTRACE("resize: win->maxy = %d\n", win->maxy); 273 __CTRACE("resize: win->maxx = %d\n", win->maxx); 274 __CTRACE("resize: win->begy = %d\n", win->begy); 275 __CTRACE("resize: win->begx = %d\n", win->begx); 276 __CTRACE("resize: win->scr_t = %d\n", win->scr_t); 277 __CTRACE("resize: win->scr_b = %d\n", win->scr_b); 278 #endif 279 return OK; 280 } 281 282